Rok - build and boost my MZ3 2006 - Page 174 - Mazda3 Forums : The #1 Mazda 3 Forum
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post #1731 of 1733 (permalink) Old 06-29-2016, 04:00 PM Thread Starter
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Quote:
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No pics? WHAT THE HELL ROSS?!
Tony, Tony , Tony ... what will we do with you

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post #1732 of 1733 (permalink) Old 07-22-2016, 01:01 PM Thread Starter
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Still rolling... was playing with the Load Comp and VE tables and gave up... Putting a fan on the Oil cooler this weekend and replacing the spark plugs ... found the last coolant leak and fixed it ... need to get an alignment done on the car ... thats it ... no more...
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post #1733 of 1733 (permalink) Old 02-19-2020, 06:04 PM
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The ECU has 3 modes of Open and Closed Loop. Just log "OL/CL Status" in MazdaEdit. The logged values are 256, 512 and 1024. If the Closed Loop Fuel maps are used "sometimes", its probably when it logs 256. I monitor the OL/CL Status and rarely see 256 and it seems inconsistent...no clue what triggers it. 512 is normal Closed Loop operation, 1024 is Open Loop.
^^IF you want to see when its using the Closed Loop maps. I don't have any and I know stoich is hard coded into normal Open Loop, so I just monitor the status so I know its in Open Loop. Also STFT will go to 0 when you switch into Open Loop, but Im sure you know that.


So in a nutshell...
Force full time OL by zeroing out the Load thresholds or TPS thresholds.
Set up your OL Fuel Map so its easy to do calcs and safe (my example above).
Calibrate the MAF Scaling and/or VE maps to make Actual AFR match the maps.

Then if the transition to high loads in the OL Fuel Map is normal, set the Open Loop Load threshold to match that transition in the OL Fuel Map. That should make the transition from Closed Loop to Open Loop much more smooth.

Note on MAF Scaling vs VE:
I went down the road of scaling my MAF to make Actual AFR match the maps and got to a point where the curve didn't make sense anymore. The MAF voltage doesn't change much between 5500-7000 so there wasn't much "adjustability" in that area. I could get it right at 5500, then it was a full point rich at 7000.

So I went back to a stock upper half of my MAF Scaling and have started adjusting VE to make the adjustment. Much better since its 3D and you have the freedom to change it by RPM and kPA (although Im really only changing the 80-100kPA cells and smoothing in between).


Im interested to hear how you are adjusting map values above a load of 1 or 100kPA for boost. Are you just doing a load offset somehow and making the maps have less resolution?
Man, this helped me out a ton. I've been fiddling with MEP without much success for a while.
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